Julius a



(No Model.)-

J. A. OLMSTED. POWER EQUALIZING APPARATUS FOR CLOCKS. No. 462,017. Patented O0t.27, 1891.

//7 l /war XA M4 'UNITED STATES PATENT OFFICE.

JULIUS A. OLMSTED, OF MERIDEN, CONNECTICUT, ASSIGNOR TO THE PARKER dc IVIIIPPLE COMPANY, OF SAVE PLACE.

POWER-EQUALIZING APPARATUS FOR CLOCKS.

SPECIFICATION forming part of Letters Patent No. 462,017, dated October 27', 1891.

Application filed March 16, 1891. Serial Nd. 385,212. (No model.)

T at whom it may concern: This driven wheel 11 has a stud or post 11, Be it known that I, JULIUS A. OLMSTED, a about which the coils of a two-armed spring citizen of the United States, residing at Meri- 15 are wound, and another pin or stud 16, den, in the county of New Haven and State against which one of the arms of said spring 5 of Connecticut, have invented certain new bear. The other arm of said spring bears and useful Improvements in Clocks, of which upon a pin 17, that projects from, the rear side the following is a specification. of the yielding wheel 18.

My invention relates to improvements in The driven wheel 11 and yielding wheel 18 clocks of the class known as equalizing are both mounted upon the same shaft and no movements, and the objects of my improveare of the same size. The wheel 18 may be ment are simplicity of construction, compactrigidly connected to the shaft 10, so as to reness in form, and general efficiency. volve therewith, or it will operate the sameif In the accompanying drawings, Figure 1 it is loosely revolved thereon while the shaft represents a front elevation of so much of a is stationary. Toward the front end of the 15 clock-movement as is necessary to illustrate shaft 10, in front of the yielding wheel 18, is my improvement, the front plate being rea hub or sleeve containing at its rear end a moved and a portion of the teeth in the train wheel 19 and at its front end a pinion 20, being indicated by broken circles. Fig. 2 is whereby said wheel and pinion are rigidly a side elevation of the same portion of a clock, connected together, but permitted to have an 20 including the front plate. Fig. is a horiindependentrotation on the shaft. zontal section of the same 011 line 0c 00 of Fig. A compound or double bridge 21 is rigidly 1, looking upwardly and showing the parts secured to the wheel 18 to form bearings for above said line. Fig. 4 is a detached front the shaft of the pinion 22 and friction-disk elevation of the rear one of the equalizing- 23, the latter standing with its edge opposite 25 wheels and equalizing-spring, and Fig. 5 is a the edge of the cam 18, while the pinion 22 7 like view of the other equalizing-wheel. is engaged and driven bythe wheel 19. The My invention is in the nature of an imwheel 19 is driven by the pinion 24 on the provement upon the spring-motor patented to shaft 25, which pinion engages and is driven David Shive October 20, 1885, No. 328,721, by the driven wheel 11. Upon this shaft 25 30 and its general mode of operation is the same; is a wheel 26, that engages with and drives but I dispense with the angle-leveremployed the pinion 20.

in said patent for connecting the equalizing- The pinion 24, wheel26, pinion 20, wheol19, Wheels and I form an edge brake for the fricpinion 22, and friction-disk 23 constitute what tion-disk instead of a side brake. I may term a branch train, and the driven 35 A designates the front plate, and B the wheelll, and yielding wheel18, withintervenrear plate, of the movement, the same being ing spring, are what may be termed equalsupported upon suitable pillars or posts (3 in izing-wheels. any ordinary manner. 27 designates the center shaft, which're- The spring '7, winding-shaft 8, and driving volves once an hour and which is driven by 40 wheeler wheels 9 may be of any ordinary a pinion 28, that engages and receives its moconstruction. tion from the yielding wheel 18. It also car- 10 designates a shaft having its bearings ries the wheel 29, from which the power may in the front and rear plates. Loosely mountbe transmitted to the escapement-wheel of a ed upon this shaft toward its rear end is the clock in any ordinary manner, or in case the 5 driven wheel 11, having rigidly connected to device is used as a mechanicalmovement the it a driving-pinion 12 on its rear side and on wheel 29 or wheel 18 may drive any desired its front side a hub provided with cam 13, all wheels or train that may be connected thererigidly connected so as to loosely revolve on with. The parts so driven may not differ said shaft, said wheel being driven by the from those ordinarily employed and are no 0 )ower-wheel 9 that en a es said )inion 12. Jart of the Jresent invention exce Jtin as I00 5 1 z: e 1 s the mechanism herein shown is designed for driving other wheels.

The operation is as follows: \Vhen the mainspring exerts more power than is necessary to drive the mechanism lying beyond the yield ing wheel, the spring 15 will yield and permit the driven wheel 11 to move faster than the yielding wheel 18, and meanwhile the mainspring or motor will also be driving the branch train and cause the disk 23 to revolve. As the spring 15 thus yields its two arms are brought nearer together. \Vhen the driven wheel 11 ms gained upon the yieldin gwheel sufficien tly to force the edge of the cam 13 against the edge of the friction-disk 23, as indicated in Fig. i, in which the broken circle indicates the friction-disk, it will act as a brake and stop said branch train, and consequently stop all revolution of the driven wheel so long as said cam ispressed firmlyagainst said disk. As shown,the cam 13 is heart-shaped; but only the lobe that comes in contact with said frictiondisk has anyfunction, and therefore the shape of the cam, aside from said lobe or eccentric, is immaterial. The driven wheel being stopped, the full force of the spring 15 will then be exerted upon the yielding wheel, so as to drive the pinion 2S and connected m echanism with only the force of the spring 15. As in the movement of the Shive patent before referred to, this spring is of about the proper strength to drive the desired mechanism. As soon as the spring-arms spread apart the disk 3, by its revolution around the axis of the wheel 18, will travel away from the cam 13, and thereby release said disk and permit the driven wheel and branch train to start again under the influence of the inainspring until the cam 13 by the faster movement of the driven wheel 11 again overtakes the disk and stops the branch train and driven Wheel, as before described, and so on repeatedly so long as the power of the mainspring exerts a greater force upon the driven wheel than that of the spring 15 upon the wheels 11 and 1S. lVhen the power exerted upon the driven wheelll is substantially equal to the force of the spring between'the equalizing-wheels, said two wheels will move along together the same as if they were one wheel.

I claim as my invention 1. In a clock of the class described, the combination of a mainspring or motor, the driven wheel 11, having cam 13, the branch train terminating in the friction-disk 23, and the yielding wheel 18, driving a train mechanism and connected with the driven wheel 11 by means of the yielding spring, whereby the force of the principal motor when too great is checked by contact of the edges of said friction-disk and cam, substantially as described, and for the purpose specified.

2. In a clock of the class described, having two equaliZing-wheels, the intermediate spring, and the brake or stop mechanism consisting of afriction-disk mounted on the yielding wheel and a cam eccentrically mounted on the hub of the driven wheel, substantially as described, and for the purpose specified.

The combination of a mainspring or motor, the shaft 10, driven wheel 11, having the cam 13 rigidly connected therewith, the pinion 24, wheel 26, pinion 20, and connectingwheel 19, mounted to rotate independently on said shaft 10, the pinion 22, friction-disk 23, the yielding wheel 18 on said shaft and upon which wheel said friction-disk and pinion are mounted, mechanism connected with said wheel 18 and driven thereby, and a yielding spring between said driven and yielding wheels, substantially as described, and for the purpose specified.

JULIUS A. OLMSTEI').

\Vitnesses:

A. M. LANE, GEORGE W. SPRAGUE. 

